Fillet piston packing



June 28, 1938.

G. o. TAYLOR v FILLET PISTON ncxm'm Filed: Ap1 i1 26, 1937 INVEN TOR.

GEORGE 0774 740;? a

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Patented June 1-938 UNIT D "STA ES" PA-TENT orries mm'r rrs'ron racxmoGeorge 0. Taylor, Cicero,

Lubrication Corporation, Chicago, poration' of Delaware Ili.,asslg'l'ior to The 111., a cor- Application April as, 1931, Serial No.new

3 Claim!- (Cl- 221-473) This invention relates to cartridges forlubricant or the like and more particularly to factory-- filledcartridges or containers in which one end is closed by a slidablymounted piston. i

the piston be packed to prevent leakage of the cartridge contents pastit both during storage and during use. However, since the cartridge isintended for only one use it is necessary to 10 keep the cost of suchpacking, including its cost of assembly in the cartridge, at a very lowfigure.

It is one of the objects of the present inventionv to provide acartridge in which the, piston is effectivelypacked simply andinexpensively.

a packing for a cartridge piston which may be assembled in the cartridgequickly and easily.

Other objects, advantages and novel features of I the invention will beapparent from the following description of the embodiments shown incompanying drawingin which:

Figures 1 and 2 are axial tions through two cartridges embodying theinvention.

The cartridge of Figure icomprises a hollow the cylindrical body it ofsheet metal, paper, or other suitable material having a head itpermanently "secured to one end thereof. ,The head if is formed with acentral outlet opening H which is surrounded by a generally v-shapedannular member it of the type moreparticularly disclosed and claimed inthe application of Harry .R. TearNo. 140,077, filed May 1, 1937. Aconcave spherical surface ll on the member I. is

5 the piston. This provides a tapered portion exformed for sealingengagement with an inlet stud on a. dispensing device, as shown, for ex-35 ample, in the patent to Dodge No. 1,987,002.

The oppositeend of the body is closed by a piston 2O slida'blymountedtherein and having an annular flange portion 22 substantiallyparallel to the body side wall and a face portion 24 conforming in shapeto the head 12. The flange and face portions are connected by a curvedpor-' tion 28 shown as oilset' inwardly to form an annular peripheralgroove in the piston face.

In order to prevent leakage between thepiston and cartridge body, anannular packing ring 30 of yieldable material such as natural orsynthetic rubber or glue composition is loosely placed in the grooveformed by the curved portion 28 in engagement with the body side wall.The packside engaging the body and with another side lyingat an angle tothe cartridge axis engaging tending into the cartridge in contact withthe contents thereof. I

The packing ring 30 seals against both the phton and body side wall toseal the Joint there- I piston In cartridges of this type it isessential that Another object of the invention is to provide ing ringis-preferably of triangular cross-section and is placed in. thecartridge witha straight 100. The curved portion I20 of Figure 2 forms 7'merely an are rather than a groove. In this case the packing ring I30rests against the curved portion i2! and friction as well as by thetridge contents thereon.

pressure or the car--v is held in placeby its natural While twoembodiments of the invention have it will be understood be made thereinand been shown and described that many changes might it is not intendedto be limited to the exact forms shownnor otherwise than by the terms ofthe appended claims.

What is claimed is:

1. A cartridge for lubricant or the like comprising a hollow body, apistonslidably mounted in said body and a packing for the pistonincluding a ring of yieldable material of triangular cross section witha straight side of the section lying against the body side wall .andanother side of the section engaging the face of the pistonat itsperipheryand the third side' of the section beingexposed to thecartridge contents throughout its entire area.

2. A cartridge for lubricant or the like comprising a hollow body, apiston slidably mounted in said body and including a skirt portion sub-7 stanti'ally parallel to the tion connected to the skirt portion by acurved portion, and an annular packing ring loosely positioned in thecartridge in engagement with said curved portion and with the body sidewall, said 'packing ring including a tapered portion projecting into thecartridge to be pressed against the body wall by pressure thereon.

'3. A cartridge for lubricant or the like comprising a hollow body, apistonslidably mounted in said body and including a skirt portionsubstantially. parallel to the body 'and a face portion of the cartridgecontents connected to the skirt portion by a curved portion, and anannular packing ring loosely posibody and a face portioned in thecartridge in engagement with said curved portion and with the body sidewall, said packing ringbeing of triangular cross section with a straightside of the section engaging the body,

side wall and with a side lying at an angle to the cartridge axisengaging said curved portion.

. GEORGE O. TAYLOR.

